Common NameBronze Birch BorerSeasonalityJune, July and August.IdentificationThis species along with A. liragus are virtually identical in external appearance. The pronotum and top of the head often have brassy to coppery reflections. On beetles of liragus, there may be two pale pub sent spots on the elytra. Characters of the male genital apparatus will separate the species. The easiest diagnostic character if available is host association. These beetles are found on birch.
Scientific NameAgrilus anxiusCommon Name
Bronze Birch Borer
Habitat
Birch groves.
Seasonality
June, July and August.
Identification
This species along with A. liragus are virtually identical in external appearance. The pronotum and top of the head often have brassy to coppery reflections. On beetles of liragus, there may be two pale pub sent…
This species along with A. liragus are virtually identical in external appearance. The pronotum and top of the head often have brassy to coppery reflections. On beetles of liragus, there may be two pale pub sent spots on the elytra. Characters of the male genital apparatus will separate the species. The easiest diagnostic character if available is host association. These beetles are found on birch.
Life History
The adults first start to emerge in late June and live about 3 weeks. Females oviposit on damaged or weakened trees, in crevices in the bark. Preference is given to exposed, open growing trees, often drought…
The adults first start to emerge in late June and live about 3 weeks. Females oviposit on damaged or weakened trees, in crevices in the bark. Preference is given to exposed, open growing trees, often drought stressed. Eggs are deposited on branches or on the trunk, (usually larger than 25 mm in diameter). Larvae bore into the cambial area. If the tree is healthy it may overgrow the damage, if not the larval tunnelling may kill the branch. The larvae feed under the bark, entering the wood to moult. Pupation occurs in the wood just beneath the bark. Adult exit holes are "D" shaped (Ives and Wong, 1988).
Conservation
Common; serious pest of ornamental plantings of birch in our area (Baker 1972).
Diet Info
Restricted to birch trees, including paper birch, weeping birch and water birch.
Range
North America, anywhere birch grows (Baker 1972).
//Citation and Rights Box - in-page ?>
Citation
//Citation and Rights Drawer - slide out ?>
Page Citation for Agrilus anxius
Page Citation
"Species Details - Agrilus anxius, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-3229. Accessed 21 Nov. 2024.
References
AuthorBaker, W. L.
TitleEastern forest insects.
Publication Date1972
Pages642 pp.
AuthorIves, W. G. H. and H. R. Wong
TitleTree and shrub insects of the prairie provinces
Publication Date1988
Pages327
Specimen Information
There are 12 specimens of this Species.
//Map Distribution ?>
12 results plotted on map in 4 markers. Note: Only records with latitude and longitude coordinates are plotted on map.